Okay, it looks like those fixes were not so bad and mainly due to some core changes as I thought.
Both background and (onebox) links should be working again after an update! Let me know if not the case and apologies for the wait time.
I do really appreciate everyone who likes my little passion project 
As for bringing it to desktop, I would love nothing more but it would require a lot more work. So, not on the immediate planning but definitely something I’d like to do!